CVE-2026-111066

High

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. From 2.0.0 until 3.14.4, multipart request processing can retain an unbounded number of open file descriptors. An unauthenticated attacker can consequently exhaust file descriptors with specially crafted multipart requests when a handler uses Request.post(). This issue is fixed in version 3.14.4.

SeverityHigh

CVSS8.2

Exploit probability—

ProductAiohttp

PublishedOct 19, 2026

First seenOct 19, 2026

Weakness typeCWE-400Uncontrolled resource consumption CWE-770Allocation of resources without limits

How to fix

Update

aiohttp3.14.4 or later

Affected products

Product	Affected versions	Fixed in
aiohttpPyPI	2.0.0 ≤ v < 3.14.4	3.14.4

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.